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• <br /> <br /> <br />Figure 13. Surface Water Manganese <br />0.20 <br />O.1B <br />0.16 <br />0.14 <br />0.12 <br />-i <br />b, 0.10 <br />E <br />0.08 <br />0.06 <br />0.04 <br />0.02 <br />0.00 <br />Dec-94 <br /> <br />Dec-95 Dec-96 <br />-~-TR-A fTR-B -QTR-C $TR-D <br />Dec-97 <br />0.20 <br />0.1R <br />0.16 <br />0.19 <br />0.12 <br />b, 0.10 <br />E <br />0.08 <br />0.06 <br />0.09 <br />0.02 l~~("b` <br />0.00 ~ •~ •~ <br />Dec-87 Dec-88 Dec-B9 Dec-90 Dec-91 Dec-92 Dec-93 Dec-99 Dec-95 Dec-96 Dec-97 <br />f-TR-A -~-TR-B -QTR-C $TR-D <br />19 <br />